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材料导报  2023, Vol. 37 Issue (19): 22050201-7    https://doi.org/10.11896/cldb.22050201
  金属与金属基复合材料 |
304不锈钢表面激光熔覆铁基中熵合金涂层组织性能研究
赵燕春1,2,*, 张林浩1, 师自强1, 李文生1, 张东3, 寇生中1,2
1 兰州理工大学省部共建有色金属加工与再利用国家重点实验室,兰州 730050
2 兰州理工大学温州泵阀工程研究院,浙江 温州 325105
3 金川集团股份有限公司镍钴资源综合利用国家重点实验室,甘肃 金昌 737100
Study on the Microstructure and Properties of Fe-based Medium Entropy Alloy Coatings by Laser Melting on 304 Stainless Steel Surfaces
ZHAO Yanchun1,2,*, ZHANG Linhao1, SHI Ziqiang1, LI Wensheng1, ZHANG Dong3, KOU Shengzhong1,2
1 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
2 Wenzhou Pump and Valve Engineering Research Institute of Lanzhou University of Technology, Wenzhou 325105, Zhejiang, China
3 State Key Laboratory of Comprehensive Utilization of Nickel and Cobalt Resources of Jinchuan Group Co., Ltd., Jinchang 737100, Gansu, China
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摘要 利用激光熔覆技术在304不锈钢表面制备Fe63.3Mn14Si9.1Cr9.8C3.8中熵合金涂层,并采用正交试验设计方案,获得制备铁基中熵合金涂层的最佳工艺参数,同时对所得涂层的微观组织、显微硬度及耐磨耐蚀性能进行观察和测试。结果表明:最佳熔覆工艺参数为激光功率1 500 W、扫描速度4 mm/s、光斑直径4 mm。Fe63.3Mn14Si9.1Cr9.8C3.8中熵合金涂层为单一FCC相结构。Fe63.3Mn14Si9.1Cr9.8C3.8中熵合金涂层的平均显微硬度为279HV0.1,约为304不锈钢基体(200HV0.1)的1.4倍。在3.5%NaCl溶液中,Fe63.3Mn14Si9.1Cr9.8C3.8中熵合金涂层腐蚀电流密度为2.532×10-6 A·cm-2,相比于304不锈钢降低了一个数量级,涂层具有明显的钝化行为。在干摩擦条件下,涂层的摩擦系数为0.55,低于304不锈钢,其磨损率为6.26×10-4 mm3/(N·m),相比于304不锈钢,降低了34%。Fe63.3Mn14Si9.1Cr9.8C3.8中熵合金涂层耐蚀耐磨性能显著优于304不锈钢,具有良好潜在应用价值。
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赵燕春
张林浩
师自强
李文生
张东
寇生中
关键词:  激光熔覆  中熵合金  工艺参数  耐腐蚀性能  耐摩擦磨损性能    
Abstract: The Fe63.3Mn14Si9.1Cr9.8C3.8 medium entropy alloy coating was prepared on the surface of 304 stainless steel by laser melting technology. The optimum process parameters of Fe-based medium entropy alloy coating were obtained by orthogonal test design. The microstructure, microhardness and wear resistance and corrosion resistance of the coating were observed and tested. The results show that the optimum parameters are laser power 1 500 W, scanning speed 4 mm/s and spot diameter 4 mm. The Fe63.3Mn14Si9.1Cr9.8C3.8medium entropy alloy coating is mainly simple FCC phase structure. The average microhardness of the coating is 279HV0.1, which is about 1.4 times that of the 304 stainless steel matrix 200HV0.1. In 3.5% NaCl solution, the current density of Fe63.3Mn14Si9.1Cr9.8C3.8 medium entropy alloy coating is 2.532×10-6 A·cm-2, which is one order of magnitude lower compared to 304 stainless steel. The coating shows obvious passivation behavior. Under dry friction conditions, the friction coefficient of the coating is 0.55, which is lower than that of 304 stainless steel, and its wear rate is 6.26×10-4 mm3/(N·m), which is 34% lower compared to 304 stainless steel. The corrosion resistance of Fe63.3Mn14Si9.1Cr9.8C3.8 medium entropy alloy coating in 3.5% NaCl solution is better than that of 304 stainless steel, and good wear resistance, which has potential application value.
Key words:  laser cladding    medium entropy alloy    technological parameter    corrosion resistance    friction and wear resistance
出版日期:  2023-10-10      发布日期:  2023-09-28
ZTFLH:  TG178.1  
基金资助: 国家自然科学基金(52061027); 浙江省自然科学基金项目(LY23E010002) ;甘肃省重点研发计划(22YF7GA155)
通讯作者:  *赵燕春,兰州理工大学教授,2005—2010年在兰州理工大学获得冶金物理化学专业工学硕士学位和材料加工工程专业工学博士学位,毕业后留校任教至今。其中2019—2020年赴美国田纳西大学诺克斯维尔分校材料系访学,主要从事金属凝固原理、非晶和高熵合金等领域开发研究,在国内外学术期刊发表论文70余篇,主持了国家自然科学基金、教育部博士点新教师基金、甘肃省杰出青年基金等课题10余项。 yanchun_zhao@163.com   
引用本文:    
赵燕春, 张林浩, 师自强, 李文生, 张东, 寇生中. 304不锈钢表面激光熔覆铁基中熵合金涂层组织性能研究[J]. 材料导报, 2023, 37(19): 22050201-7.
ZHAO Yanchun, ZHANG Linhao, SHI Ziqiang, LI Wensheng, ZHANG Dong, KOU Shengzhong. Study on the Microstructure and Properties of Fe-based Medium Entropy Alloy Coatings by Laser Melting on 304 Stainless Steel Surfaces. Materials Reports, 2023, 37(19): 22050201-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.22050201  或          http://www.mater-rep.com/CN/Y2023/V37/I19/22050201
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